A uniform rod of mass M = 2 kg and length L is suspended by two smooth hinges 1 and 2 as shown in the figure. A force F = 4N is applied downward at a distance from the hinge 2. Due to the application of force F, the hinge 2 breaks. At this instant, applied force F is also removed. The rod starts to rotate downward about hinge 1. (g = 10 m/s²). Choose the correct statement(s):-

Question

G1 Physics · Accepted Answer

Use τ⃗=r⃗×F⃗ and Στ=Iα. For equilibrium, set ΣF=0 and Στ=0; for impending toppling take moments about the contact edge. Substituting the stated dimensions/forces gives A: The reaction at hinge 1, before hinge 2 breaks, is 11 N; C: The reaction at hinge 1, just after breaking of hinge 2 is 5N.